COMPOUND SENTENCES
Definition
A compound sentence contains two or more independent clauses joined together. Each independent clause could stand alone as its own simple sentence, but they are connected to show a relationship between ideas. The clauses are joined by coordinating conjunctions (for, and, nor, but, or, yet, so — remembered as FANBOYS), by semicolons, or by conjunctive adverbs (however, therefore, moreover, etc.) followed by a comma.
Structures:
[Independent Clause] + [, FANBOYS] + [Independent Clause]
[Independent Clause] + [;] + [Independent Clause]
[Independent Clause] + [; Conjunctive Adverb,] + [Independent Clause]
Key Rules
✔ Rule: Both clauses must be independent — each must have its own subject and verb and express a complete thought.
✔ Rule: When using a coordinating conjunction (FANBOYS), always place a comma BEFORE the conjunction.
✔ Rule: A semicolon alone can join two independent clauses without any conjunction.
✔ Rule: Conjunctive adverbs (however, therefore, meanwhile, consequently, etc.) must be preceded by a semicolon and followed by a comma.
✔ Rule: Avoid comma splices — do not join two independent clauses with only a comma and no conjunction.
FANBOYS Quick Reference:
For = reason/cause | And = addition | Nor = not either | But = contrast | Or = alternative | Yet = contrast | So = result
10 Examples of Compound Sentences
1. I wanted to go to the beach, but it started to rain. [but = contrast]
2. She studied hard all semester, so she passed her exams with flying colors. [so = result]
3. Tom plays guitar, and his sister sings in the school choir. [and = addition]
4. We can take the highway, or we can go through downtown. [or = alternative]
5. He didn’t call, nor did he send a message. [nor = not either (note inverted subject-verb)]
6. The meeting ran late; everyone missed the last bus home. [semicolon joining two clauses]
7. The food was delicious, yet the service was incredibly slow. [yet = unexpected contrast]
8. She had worked at the company for ten years; therefore, she was offered the promotion first. [conjunctive adverb]
9. I love cooking for my family, for it brings everyone together. [for = reason]
10. The storm knocked out the power; however, the game continued by flashlight. [however = contrast/concession]
📌 Note: Don’t confuse compound sentences with simple sentences that have compound predicates. ‘She ran and jumped’ is SIMPLE. ‘She ran, and he jumped’ is COMPOUND — two subjects, two verbs, two clauses.
Extended Dialogue: Compound Sentences in Action
Context: Two coworkers — Sam and Dana — are discussing their weekend plans at the office. Pay attention to how each sentence links two complete thoughts.
Sam: I was going to clean the house this weekend, but I really don’t feel like it.
→ Clause 1: I was going to clean the house | but | Clause 2: I really don’t feel like it
Dana: I know the feeling! I planned to go grocery shopping, yet I haven’t left the couch.
→ yet = unexpected contrast between planning and inaction
Sam: We could go together on Saturday, or we could just order delivery all weekend.
→ or = presenting two alternatives
Dana: Delivery sounds great; my wallet might not agree, though.
→ semicolon joining two independent observations
Sam: Fair point. I’ll make a list, and we can split the grocery run.
→ and = addition of a second related action
Dana: That works for me. I need vegetables, for I’m trying to eat healthier this month.
→ for = provides the reason/cause
Sam: Me too! I started meal prepping last week, so I have lunches ready every day.
→ so = result of meal prepping
Dana: That’s so smart; I always end up buying overpriced sandwiches at the café.
→ semicolon connecting two contrasting habits
Sam: I can show you how I do it, or you can just come over on Sunday and we’ll prep together.
→ or = two alternatives offered
Dana: I’d love that! You cook, and I’ll handle the cleanup.
→ and = coordination of two responsibilities
Sam: Perfect deal. Neither of us will be bored, nor will we be hungry.
→ nor = neither of two negatives applies
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